Abstract: A steel hardening by precipitation in a martensitic matrix and having an iron-nickel, iron-chromium, or iron-manganese basis is austenitized and then subjected to a heat treatment including heating it to at least 500.degree.C. This hardens the steel and at the same time increases its coercive force.

Abstract: A semiconductor arrangement comprises metal contacting strip means forming a pattern of connecting parts for receiving semiconductor components or their connecting wires, in which metallized insulating platelets are provided on the metal contacting means and connected to semiconductor components and/or contact points by connecting wires.

Abstract: Circuit arrangement for producing an alternating output voltage from a d.c. input voltage employing two d.c. to a.c. voltage converters, i.e., inverter circuits, which are controlled by high frequency pulse width modulated signals so that one of the inverter circuits produces the positive half waves of the alternating output voltage and the other inverter circuit produces the negative half waves of the alternating output voltage. The outputs of the two voltage inverter circuits are connected in series across a common load and controlled electronic power switches are provided to short-circuit the output of the respective inverter circuit during the time period when it is not producing output energy.

Abstract: A method and apparatus for demodulating an input signal modulated according to the phase shift keying (PSK) modulation method wherein the modulated input signal is combined with a reference voltage of the same frequency which is leading in phase by one-quarter of the period duration of the input signal, the resulting output signal is delayed in time by one-half of the period duration of the input signal and is combined with an identical but undelayed signal to provide a control voltage, and the control voltage is utilized for setting the phase of a further reference voltage which is then combined with the input signal to produce the demodulated output voltage.

Abstract: In a circuit for the automatic dynamic compression or expansion of a signal between its input and its output, the circuit presenting a useful signal path connected between its input and its output and containing a setting member which is electronically controllable for varying the transmission factor between the circuit input and output, the circuit also presenting a branch path connected at one point to the useful signal path and containing a control voltage generator for generating, from the signal in the useful signal path, a control voltage applied to control the setting member, there is also provided a second setting member connected in the branch path and arranged to be electronically controllable for varying the transmission factor exhibited by the branch path, and means connecting the output of the control voltage generator to the second setting member for effecting a counterregulation of the transmission factor of the branch path, relative to the transmission factor variation imparted to the useful s

Abstract: The deflection system yoke for a television receiver cathode ray tube includes saddle shaped coils having a plurality of windings arranged in strands along the neck of the tube. The strands are achieved during the winding procedure by introducing starting points for the first winding of each strand. All strands together form a rigid unit.

Abstract: A method of making an electrode printing head comprises the making of two separate sheet metal parts each formed of a series of juxtapositioned, spaced electrodes held together by at least one interconnecting web; and securing the two sheet metal parts to insulating components of the printing head in such a manner that the electrodes of the two parts are in a non-contacting, intermeshing relationship with respect to one another, whereby the electrodes of the one and the other sheet metal part alternate with one another and form an electrode row on the printing head. Subsequent to the securing step, the interconnecting webs are removed.

Abstract: A method of contacting contact points of a semiconductor body comprises first attaching the semicoductor body to a heat conducting portion of a first frame with inwardly directed tongues directed towards the contact points, positioning a second frame with inwardly directed tongues engaging with their ends, the contact points, the second frame also engaging the first frame, attaching the frames and semiconductor body together at the engagement points and thereafter separating each of the two frames to provide insulated leads to the contact points.

Abstract: A method for producing diffused, contacted and surface passivated semiconductor chips for semiconductor devices, wherein after producing a semiconductor wafer with a given arrangement of layers and regions of different conductance and different conductivity types for a plurality of devices by doping with impurity forming elements, both of the major surfaces of the semiconductor wafer are provided with respective metal layers and output electrodes are applied to both of the metal layers for the plurality of devices with the output electrodes being of such a thickness and overlying such areas of the metal layers so that the thickness of the electrodes will still be sufficient for further processing after a subsequent separation of the wafer into the plurality of chips and the major surfaces of the chips after separation, are completely covered by the output electrodes.

Abstract: A method for treating waste gases containing radioactive contamination, particularly krypton and xenon nuclides. The waste gas stream to be decontaminated is initially conducted through an enrichment system wherein the waste gas stream is divided into at least two partial streams one of which is substantially free from the radioactive impurities and constitutes the poor gas fraction and another of which constitutes the rich gas fraction. The poor gas fraction is discharged, at least in part into the atmosphere while the rich gas fraction is fed into an activated carbon delay path whose output is discharged, either directly or indirectly into the atmosphere. Apparatus for carrying out the method is also disclosed.

Abstract: A cell including two oppositely disposed electrodes and an electrically insulating substance spacing the electrodes from one another and bonded to a polymer cemented one of the two electrodes, there being protrusion created channels between the electrodes for the flow of electrolyte between the electrodes.

Abstract: An improved apparatus for producing coils for electrical machines of the type wherein the wire windings are formed on a coil winding body in the form of a slide core by means of flyers which are rotated relative to the coil winding bodies, so that the major portion of the wire windings are pushed, during the winding process, onto a coil holder which is in engagement with the slide core. The apparatus is provided with a plurality of adjacent slide cores, which are jointly in engagement with the same coil holder during the winding process and which are each provided with a respective flyer. The rotational movements of the individual flyers about the associated slide cores are controlled to be in synchronism with one another during the winding process, whereby a plurality of coils of the complete winding may be simultaneously wound.

Abstract: An integrated semiconductor arrangement comprises a semiconductor body having a solar cell and a rectifying metal-semiconductor contact. The invention also includes a method of making such an arrangement.

Abstract: A controllable and quenchable rectifier circuit for high d.c. current values, which is fed from an alternating or three-phase current main and includes a plurality of controllable rectifier elements each having associated therewith quenching devices to reduce feedback to the main. A plurality of like controllable and quenchable partial rectifier circuits are provided which are connected in parallel on the a.c. or input side in a rigid and low impedance manner and which are each connected on the d.c. or output side via impedances to two bus bars which feed a load. The current conducting controllable and quenchable rectifier elements of the rectifier circuits are quenched in a stepped sequence.

Abstract: Circuit arrangement in a remote control receiver unit for evaluating received remote control signals by counting the number of periods, particularly of ultrasonic oscillations for the remote control of a radio or television set, the arrangement including an oscillator producing oscillations which are utilized for the evaluation, and which have a frequency higher than the frequency of the received oscillations, a counter connected to receive the higher frequency oscillations and to be controlled by the received oscillations so that when the received oscillations are present the counter emits a pulse during each of the received oscillation periods and when no received oscillations are present due to interference, the oscillator oscillations are divided by the counter to the frequency of the received oscillations so that interruptions in the received oscillations have no influence on the subsequent circuit portions.

Abstract: A mask for use in production of semiconductor arrangements comprises a mask element with projections thereon at a side adapted to face the semiconductor arrangement, the projections being adapted to cooperate with recesses in the semiconductor arrangement to locate the mask element thereon.The invention also includes a method of producing the semiconductor arrangements.

Abstract: A method of photographic transfer of an original pattern onto a substrate having a photo-sensitive coating comprises carrying out repeated partial exposures which together make up a complete exposure, with the pattern being renewed after each partial exposure. Such renewing includes either relative movement between pattern and substrate or exchange of pattern members having the same pattern.

Abstract: In a circuit arrangement for digitally indicating the tuned frequency of a radio receiver operating in the AM and FM ranges in which the oscillations of the AM tuning oscillator and of the FM tuning oscillator are amplified, converted to rectangular oscillations, counted by means of electronic counters and then digitally displayed, the oscillations of the AM tuning oscillator and the oscillations of the FM tuning oscillator are amplified by a common broadband amplifier which is sufficiently broadbanded so that the oscillator frequencies for the AM range as well as those for the FM range are both passed and amplified and the coupling of the input of the broadband amplifier to the outputs of the tuning oscillators is so loose that the tuning oscillators are not noticeably detuned by changes in capacity in the broadband amplifier.

Abstract: A transmitter amplifier comprises a transistor forming a class B or C amplifier element and output and input circuits for the amplifier element connected by a low-pass filter with a limiting frequency below the intended frequency band of the amplifier.

Abstract: A monostable trigger arrangement comprises a monostable trigger stage controlled by a switch unit which is triggered by a control pulse to release a pulse from the monostable trigger stage and is returned to its untriggered state by an erase signal.